On Mon, Feb 08, 2010 at 01:32:33AM -0500, Alex Deucher wrote: > On Sun, Feb 7, 2010 at 6:12 PM, Domenico Andreoli <ca...@dandreoli.com> wrote: > > Hi all, > > > > I'd like to write a hwmon driver for the Radeon GPUs. I made a quick > > search in the M56 and M76 register references on AMD's site but didn't > > find anything. I then wrote to gpudriverdevsupp...@amd.com and now I'm > > waiting for some response. In the meanwhile, has anybody of you seen > > anything related to this task while working at the graphic drivers? > > > > Supposing I will find the missing info, I see the first problem. I > > guess the hwmon registers are in the address space mapped by the DRM > > driver. Surely I could make a patch but then the radeon's hwmon support > > would depend on the DRM driver. And if one wants the hwmon support > > but doesn't want DRM? Would she need/use a different hwmon driver, > > maybe thank to some Kconfig trick? Any advice? > > The thermal and fan chips are generally 3rd party chips connected via > i2c. I think most of the chips used have hwmon drivers already. You > can look up the chip and i2c address in the power tables in the bios. > See the PowerPlayInfo table definitions in atombios.h. I've started > work on cleaning up the radeon i2c buses for external use in the > drm-radeon-testing branch of Dave's drm tree: > http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=summary
I have a question: once the i2c cleaning is completed, every known sensor hooked to it is available to the user-space. Would have any sense that I worked on a hwmon wrapper in the kernel? Which duties would still require the mighty kernel? -----[ Domenico Andreoli, aka cavok --[ http://www.dandreoli.com/gpgkey.asc ---[ 3A0F 2F80 F79C 678A 8936 4FEE 0677 9033 A20E BC50 ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
